Blender AttributeError: 'PreferenceView' object has no attribute 'use_international_fonts'
It seems that the version of Groove3D that you're using hasn't been updated for Blender 2.83. This Blender version introduced a change to the Python API. The handling of languages and translation were adjusted by:

https://developer.blender.org/D7210
https://developer.blender.org/rB968619d03626c7e4d92d4cb383ac304b72595af3

As a consequence the use_international_fonts mentioned in the error message no longer exists.
Therefore, I would suggest you contact the developer, in case they aren't aware of this change. In the meantime you could use the add-on in Blender 2.82.